surficial

From superficial, under influence from surface.

• (UK) IPA^(key): /səːˈfɪʃl/
• (US) IPA^(key): /səɹˈfɪʃ(ə)l/
• Rhymes: -ɪʃəl

surficial (not comparable)

1. (geology, astronomy) Of or pertaining to the surface of something, particularly the surface of the Earth.

   When the soil swells on wetting, the former surficial material is mixed with the subsoil.

• superficial

• “surficial, adj..”, in OED Online  ⁠, Oxford: Oxford University Press, 2012.